본 연구에서는 동, 아연광의 부선 테일링을 재부선하여 얻은 황화철 정광의 활용을 위해 이것을 염소화하여 고순도의 염화제이철을 얻고자 하였다. 염화제이철을 산화시켜 자성용 산화철을 얻는 것이 최종목적이었다. 이번 연구에서는 시료의 염소화반응을 알기 위하여 열중량분석 결과를 검토하였고, 이것에서 얻은 결과에 의해 350 ℃에서 시료를 염소화할 때 수율은 95 %이었고 염화제이철은 높은 순도의 것을 얻을 수 있었다.

Utilization of iron sulfide concentrate which was obtained from floatation tailing of copper and zinc ore by refloatation has been studied. To obtain high purity of iron chloride, chlorination of the concentrate was proceeded and the product was separated from other chlorides. The ultimate purpose of this study was to make magnetic iron oxide by oxidation of pure iron（III） chloride. The chlorination of the sample was examined by means of thermogravimetry, and the purity of iron(III) chloride was high. From the results, the optimum temperature of reaction was 350 ℃ and the yield of iron(III) chloride was 95 % by weight.